Turbine-meter.



C. G. DE LAVAL.

TURBINE METER.

APPucATIVoN min Ausila. 1915.

1,235,559 'Patented Aug. 7, 1.917?.V

nNirE srnrns ATENE oEEicE.

GARL'GEORGE DE Lnvnnor ORANGE; `NEW .iERsEY, AssIeNoR rro HENRY R. WORTH- INGTON, or NEW YORK, N. Y., AcoRroRATroN 0E NEw JERSEY. Y

'rURR'INE-METER.

Specification of Letters Patent.

Patented-Aug. 7,1917.

Application sied August 13, 1315. f serial No. 45,272. A

To all whom it may concern-.i h Be it known that I, CARL GEORGE DE LAVAL, a citizen of the United States, resid-` ing at Orange, county of Essex, and State of New Jersey, have invented'certain new and useful Improvements in Turbine-Meters, fully described and represented in the f ollowing specicationfand the accompanying drawings, forming a partV of the same. This invention relates to liquid 'meters of that class known 'as turbinemeters in which the liquid acts to rotate a vane wheel, the especial obj ect of the invention being to provide an improved construction by whichun'iformity and accuracy of registration shall be secured with varying amounts of lliquid.

passing through themeter.

` VItis found in practice that previous ineters of this class are liable to lirregularities in registration on dierent ows, so that, fal- ,though accurate registration is secured on some flows, the meter will register inaccurately on other flows, this difficulty arising especially in the registering of small flows. I have discovered that this diiiiculty can be avoided and accurate registration securedon widely varying flows by the'us'e of stationary guiding nozzles on the wheel inlets or inlet, by which the wateris guided into the wheel in such a manner that no eddies or counter currents are set up and regularity of How to the wheel secured on both small` wheel. The invention consists in these features and certain constructions and combinations of parts embodying the same.

For a full understanding of the invention, a detailed description of a construction embodying all the features of the same in their preferred form will now be given in connection with the accompanying drawing, and the invention then specifically pointed out in the claims.

In the drawings- Figure l is a vertical section of the meter on the line 1-1 of Fig. 2;

Fig. 2 is a horizontalsection on the line 2-2 of Fig. 1.

Referring to the drawings, the meter shown is the same in general construction A and operation as that of United States Letters Patent' to Sims, No. 1,133,408, I

March 30, 1915, except as modied to em! body the present invention, and reference may be had to said Letters Patent- No.

*1,133,408, and to United States Letters Patent to Ray, No. 1, 005,87 5,'V dated October 17,

1 911, for afull description of the construction andoperation vof such turbine meters.

In the meter shown, A is the metercasing;

B the'inlet; C the outlet, and D the' meter `/B to casing A above and below the volute E f through vertical strainer F. The meter .h wheel D is Xed on shaft 11, which operates thecounte'r'through registering mechanism v "of any suitable form,this shaft 11V being f Shownas mounted in bearings i12' Carried'- Atv arms 13 'on the top and bottom plates y14 which "form the'4 opposite walls of the wheel chamber, and through which are the central s openings 10.

Referringnow to the features especially embodying the present invention, the inlets '10' are formed with an interior' stationary guidepiece 15 having aicurved surface 1`by which the liquid is directed outward to the vanes of the wheel D, andthe opposing'wall 2'of the inlet'10 is referably curved so as to form with the sur ace 1 a contracting nozzle through which the liquid passes to wheel D. Each of the nozzles preferably is divided by a series of stationary vanes 3, four being shown, although this number may be varied, which also aid in securing the desired regularity of flow to the wheel. These vanes are shown as straight radial vanes, but it will Vbe understood that their form ymay be varied'. Preferably, and as shown, these vanes are formed integral with the plates 14 and bearings 12, so as to support the latter, vand it will be vunderstood that, with the vanes 8 thus supporting the bearings 12 from plates 14, the arms 13 may be omitted, which in some cases may be desirable for a freer iiow of the liquid to the wheel.

' The diffusion vanes preferably used are shown as curved, vanes 4 carried by top and bottom plates 16 set into plates 14 to forma diffusion ring between the wheel D and volute E, so that the water leaving the wheel passes between these vanes and the whirling motion is taken out of the liquid and velocf ity converted into pressure, and thus the VWater is delivered to the volute E more smoothly and uniformly, thus aiding in securing accuracy of registration on varying flows. ferred, but straight radial vanes, or diilusjin-g vanes of other form, may be used.

The invention secures a more regular and uniform flovv of the liquid through the meter on varying streams, and thus avoids the irregularities in registra-tion incident to previous meters. The stationary guiding surface avoids the whirling motion imparted to Vthe liquid by the Wheel hub or similar guides carried by the Wheel, and the nozzle construction and dividing vanes aid in securing Vthe uniformity of action on varying streams 'that the invention is not limited to turbine meters of the Aparticular form sho-Wn, but may be applied to other turbine meters.

Vhat is claimed is: l. In a turbine meter, the combination with a meter Wheel having an axial inlet and radial discharge, of an annular nozzle for directing the incoming liquid to the Wheel and constructed to deliver the liquid radially The curved vanes shown are pre- .Y

outward to the Wheel vanes, stationary vanes dividing the nozzle space, and a diffuser to which the Wheel delivers.

2. In a turbine meter, 'the combination with a meter Wheel having an axial inlet and radial discharge, of a stationary annular nozzle lWithin the inlet having its guiding surfaces curved to deliver the liquid radially outward to the Wheel vanes, diffusion vanes to which the Wheel delivers, and a diii'usion volute outside the diffusion vanes.

3. In a turbine meter, Athe combination with a meter Wheel having an aXial inlet at each side of the Wheel and radial discharge, of an annular nozzle for directing the incoming liquid to the Wheel and constructed to'deliver the liquid radially outward to the Wheel vanes, stationary vanes dividing the nozzle space, and a diffuser to which the Wheel delivers.

4. In a turbine meter, the combination with a meter Wheel having an vaxial inlet at each side of the Wheel and radial discharge, ot a stationary annular nozzle Within each inlet having its guiding surfaces curved to deliver the liquid radially outward to the Wheel vanes, diffusion vanes to which the Wheel delivers, and a diiusion volute outside the diffusion vanes.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing Witnesses. i

oARL Gli-onen .DE LAvAL.

Witnesses:

C. T. HEDDER, W. J. FRITCHMAN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner `of Patents, Washington, D. C. 

